Silurian Period
Silurian Period : The period following the Ordovician Period of the Paleozoic Era and preceding the Devonian. This time is usually given as 430 million to about 395 million years ago. The name Silurian was devised by Murchison, who chose it for the Silures, a tribe living in pre-Roman Wales. The Silurian was an age of mountain building: The events of this time raised the Scottish Highlands in Britain and the Taconic Mountains in eastern North America, and closed the proto-Adantic Ocean, Canada, Scandinavia, and South Africa were probably equatorial iandmasses, Japan and the Philippines were near the North Pole, and South America and Australia were near the South Pole. Generally speaking, the climate throughout this time was mild to tropical and the seas were shallow, a combination that encouraged the growth of calcareous invertebrates, which in turn produced vast limestone deposits
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